Implement drive lock device



Sept. 23, 1947. W, F, SCHMIED 2,427,880

IMPLEMENT DRIVE Loox DEVICE Filed Dec. 18, 1945 2 Sheets-Sheet 1 l @jf-@x /6 as V- "SepL 23, 1947.

w. F. scHMlED 2,427,880

IMPLEMENT DRIVE LOCK DEVICE 2 Sheets-Sheet 2 Filed Dec. 18, 1945,ZZ-Mezz?? a PM @uw @famed Patented Sept. 23, 1947 IMPLEMENT DRIVE LOCKDEVICE William F. Schmied, Bine Island, lll., assigner to InternationalHarvester Company, a corporation of New Jersey Application December 18,1943, Serial No. 514,781

8 Claims.

1 This invention relates to a new and novel implement drive lock, andhas for one of its principal objects the provision of means for lockingan implement drive chain in driving or non-driving 4, showing thelocking mechanism in successive operating positions.

Referring now to the drawings, the reference numeral ID indicatesgenerally a manure spreader position. 5 having a cart, wagon or bodyportion l2 and a An important object of this invention is to spreaderunit H5 .positioned at the rearvend `of provide a positive lock for theimplement drive the cart. chain in disengaged position and, incombination The spreader unit I4 comprises means Vfor beattherewith, apositive locking means for locking ing, agitating, and distributingmanure fed to the the implement drive chain in engaged driving spreaderunit from thle Wagon portion i2. Thi position. particular means emp oyedin the spreader uni AnOther important object of this invention is arenot shown in detail, but it is torbe understood to provide an improveddrive chain looking device that a beater (not shown) is rotatable on `ashaft for agricultural implements which may be enl5, and an auger i8,paltiallyShOWn, S TROU-flied gaged or disengaged with the drivingmechanism 0n 2 Shaft 29- This Wide-Spreading auger la in merely bysuccessive pulling and releasing of a the present instance2 shown ashaving faislwpull cord. tooth periphery at The means `for Aee 'ng Astill further important object is to provide manure from the Wagon tothe .spreader unit an agricultural impIement drive chain resilientiycomprises an ndless Slaltted Chain fgolflvfeyerrl 319- maintained innon-driving position. The Wagon i 2 has at east one Dall' 0 W @e S Atthe present time, agricultural implements of 24, 01 0f Which has beenremoved'flom the the manure-spreader type employ driving chainsChev/ings to more adequately shOW the parts 0f adapted to engage adriving sprocket and also the invention. The Wagon itself has sides 2Band adapted to be raised from the driving sprocket abottom 28. Theconveyel Chains 3U are mOn-md by some manual lifting means The drivingon sprocketsV on a shaft 32 in the spreader. yunit chain normallyengages the driving sprocket and have cross slats 3l! extending betweenthe until such time as it is lifted and released there- Chals t'legularHGTVSJS llung gli@ .plflllfrom. ery t ereo to carry manure a e o om o eIt is a particular Object of the present inveuwagon to the spreader'unitI4, where it is thrown tion to provide a Similar driving Chain formanure 3() to the ground by .the wide-spreading auger 18. spreaderswhich is normally disengaged from the 'lebCtlVeyg Cfhlns 39 are'Zadapted i90 IU-n 011 driving sprocket e Io 'om o ewagon Another andstill further important object is The Wheels 24 are-mounted 0n an H1635-AS to provide a manure Spreader having the usual the manure spreader isdrawn by a tractor or driving Chain adapted to engage and djsongagoother drive means, the axle 35 is rotated; A a driving sprocket and,further, to lock the driv- Sprocket '38 is keyed t0 the 3X1@ 35 and uponing Chain in engaged or disengaged positionmovement of the manurespreaderlthe sprocket Still another importent object of this invention38 turns with the Wheels and the axle L36. The is to provide e ioekingmeans for a manuro sprocket 38 is adapted to impart rotation tothespreader drive which is capable of maintaining fill Shafts l5, 2, and 32in the spreader unit I4. a driving @hein in engaged driving position anddriving chain di), as best shown 1n Figure 2, 1s which is capable ofmaintaining the driving chain engageable With the Sprocket 38 and drlVeSa in non-driving position, all by means of a single Sprocket '42 0n 'theShaft 3 2' A Second Sp1' Qcket lock which is operable by a single pullcord. M Ol the same Shaft 32 15 adapted- '50 dmv@ a .other and furtherimportant objects of this Li5 chain 6B, which joins a Sprocket 43 on theshaft invention will become apparent from the follow- 25' Similarly theShaft I5 is given rotation by ing detailed description and accompanyingsheets means of a Chain 5g which Surrounds a Second of drawings, in Whohstolrclgkle: on the shaft 2U and a sprocket 52 on the Figure 1 is apartial side elevation of the s a manure spreader of this invention withone of Normally. the drwe @han .50 ls held m the the wheels removed andshowincr the drive-chain upper pqsltlon as shown.n.1 Flgur 1 by reasonf. 4. The driving chain 4i! extends mechanism 1n non-driving position ofa' Sprmg 5 Figure 2 is a WOW similar to Fi ure l Sho 7i around theSprocket i2 on the shaft 32. and the g n? around sprockets 58 and 60. Bymeans of a plu- ".drwe'clam mehamsm m drwmg posltlfmf 55 rality of leverarms, it is possible to shift the Figure 3 1s a sectlonal View taken onthe llne driving chain 40 from its non .engaging Sprocket 3 3? of Flgtrel; position, as shown in Figure 1, to `the engaged Figure 4 is a detailof the drive-chain locking Sprocket position shown in Figure 2 mechanismand is a view taken on the line li-li AS best Shown in Figure 3, a StubShaft 52 is 0f Figure 3; and 60 welded to an auxiliary plate 64 fastenedto the Figures 5, 6, and '7 are views similar to Figure wagon side Wall26 by bolts or the like 6B. An

3 additional bracket member 68 is attached to the auxiliary side plate64 at 'I0 and to the wheelsupporting depending bracket 12 at 'I4 bymeans of a bolt or the like. The stub shaft 62 is shown extendingthrough the bracket 68 and welded at 16 and '|8. One lever arm 80supports the sprocket 58 within a slot 82. Adjustment means 84 ismounted on the end of the lever 80 for the purpose of shifting thesprocket 58 within the slot 82. The particular details of this adjustingmechanism are not shown for the rea-son that they form no part of thepresent invention and could be made in a number of ways. A second leverarm 86 supports the sprocket 60 and is also journaled on the shaft 62,as shown in Figures 1, 2, and 3. The sprocket 60, as best shown inFigure 3, is mounted between the pair of arms 86 and 88 and is journaledon a shaft 90 extending therebetween. The chain 40 is shown engagingthis idler sprocket 60. The arm 88 is equipped with a dependingextension 92 and by means of a spring 94 attached to the lower end ofthe bracket 68 at 96 the upper end of the arm 88 is normally impelledupwardly. The spring 94, as shown in Figure 1, is adapted to pivot thearm 88 about the shaft 62 so that the sprocket 60 is adapted toresiliently maintain tension of the chain 40.

The lever 80 has an upwardly extending arm 98 welded thereto at |00. Asbest shown in Figure 3, the lever arm 80 consists of two parallelsections similar to the arms 86 and 88. The upwardly-extending arm 98 isalso journaled on the stub shaft 62 and has one end of the spring 54connected to the upper end thereof at |02, It is evident, therefore,that as the lever 98 is held in a rearwardly inclined position becauseof the spring 54, the lever arms 80 are held in the position shown inFigure 1, with the sprocket 58 fully extended and substantially on aline with the sprockets 42 and 60.

An additional means is provided on the under side of the chain 40 toprevent it from sagging and contacting the sprocket 38 at a time whenengagement is not desired. This means consists of a roller |04 mountedon an arm |06 which in turn is pivoted at |08 on the dependingwheelsupporting bracket 12. A downwardly-extending arm is welded to oneof the levers 80, as shown at ||2, and has a connecting link |I4 joiningthe lower end thereof at H6. The other end of the link I4 joins theroller |04 and its arm 06. When the lever arms 80 are in an upperposition, such as shown in Figure 1, the connecting link 4 maintains thepivot arm |06 in its upward position, thereby preventing the chain 40from sagging and permitting unwarranted engagement with the sprocket 38.

A pull cord I I8 is also attached to the upper end of the arm 98 at |02,and pulling thereof will necessarily be against the action of the spring54. The forward end of the pull-cord 8, although not shown, ispreferably positioned at some point adjacent the operator of the tractoror other draft vehicle so that the operator thereof is permitted to keepthe driving chain 40 in its upper position, as shown in Figure 1, or toeffect an engagement of the chain 40 with the sprocket 38 by a forwardpulling of the pull-cord H8.

A plate member |20 is bolted to the bracket 68 at |22 and is adapted toCarry locking means for engagement with the complementary locking meanson the arm 98. However, disregarding the locking means for the moment,it Will be evident that a forward pulling of the cord ||8 will cause apivotal movement of the bell-crank formed by the arms and 98 about thepivotal center on the shaft 62. Such movement will effect a dropping ofthe forward end of the chain 40 so that the chain 40 is wrapped aroundthe upper portion of the sprocket 38. If no locking means wereavailable, it would be necessary to maintain the rope pull ||8 underconstant tension. Heretofore, instead of having a rope pull such as theone shown at H8, a solid link was employed and could be rigidly held ineither forward or rearward position by means of a rack and associateddetent positioned adjacent the operator. Further, prior machines did notnormally maintain the drive chain 40 in an upward position by a springsuch as the one shown at 54, but rather the chain 40 was held up bymeans of the` solid link actuating lever.

The present device has a locking means for positively holding the drivechain 40 in engaged position, as shown in Figure 2. The lock is shown ingreater detail in Figures 3 to 'l inclusive. A part of the lock consistsof a triangularly-shaped wheel |24 having rounded apices |26, |28, and|30 and having concave sides |32, |34, and |36. The triangular wheel |24is pivoted on the actuating upright lever 98, as best shown in Figure 3,by means of a stub shaft |38. The triangular wheel |24 is adapted toride on the upper edge of the plate |20. The upper edge of this plate|20 has two cut-out portions |40 and |42. The cut-out portions |40 and|42 are identical in shape but are in opposite relationship with eachother. A smooth curved portion |44 on the upper edge of the plate |20joins these two cut-out portions |40 and |42.

When the drive chain is positioned as shown in Figure 1 of the drawings,the triangularlyshaped wheel is in the position shown in Figure 4 wherethe apex |28 of the wheel |24 is lodged within a small minor recess |48of the large cut-out portion |40. The recess |45 has an arcuate radiusclosely approximating the radius of the apices |26, |28, and |30. Thespring 54 maintains the apex |28 within the recess |46, and it .is quiteevident that if the spring should break or otherwise become inoperative,the drive chain 48 would not be permitted to drop onto the sprocket 33but would be maintained in its upper position by reason of the apex |26of the triangular wheel |24 striking a substantially vertical wall |48and settling down into an arcuate recess |50 substantially the same sizeas the recess |48.

In order to effect a driving position of the chain 48, it is necessaryto pull the rope ||8 forwardly against the action of the spring 54. Theeffect of such forward pulling of the rope I8 is the same as that justdescribed for a failure of the spring 54 wherein the apex |26 lodged inthe recess |50, as shown by the dashed lines in Figure 4. At this pointthe pull rope ||8 is released and the action of the spring 54 carriesthe arm 88 and hence the triangular wheel 24 rearwardly, and inasmuch asthe triangular wheel has rotated by reason of the apex |26 slid ing downthe vertical wall |40 to the recess |50, the apex |28 has also rotatedto a position as shown in the dotted lines, whereupon the rearwardpulling of the spring 54 will carry this apex |28 above a cam endportion |52, as shown in Figure 5, which causes further rotation of thewheel |24. The spring 54 still maintains the chain 40 in its disengagedposition, as shown in Figure 1. A subsequent forward pulling of the ropeHB will now, however, .cause the apex .|26 to .strike .a hump |54adjacent .a .large .recess 15B .in the .bottom of .the cut-.out ,portion|40. The resultant .position of .the triangular wheel |211, after a.forward `pulling .from the position shown in `Figure 5, is as .shown.in the `dashedvline position of the tri-angular wheel lin .Figure .5.Figure 6 shows .the/.next position of .the .triangular .wheel |24 upon.continued fforward pulling ,of the .rope ||ii` In such position, .theconcave side |32 has rolled over so that itnow slidingly engages thesmooth arcuate portion .L24 of the upper .edge of the plate |20.

The triangular wheel .|24 in Figure Y .moves forwardly Vbly .a.continued .pulling .of .the .rope 1| 8 and, as shown in Figure '7,completes itsiorward movement as shown .by the dashed-line position of'the Jtriangular wheel |24. In such .position the apex .|311 lodges in arecess |58, which .lies .in such a position that a continuation of thearcuate surface IM would intersectsuchrecess |58. -This `recess |58 issimilar to the recess Ulli .shown in the cut-,out portion .IRB andperforms the .same function. However,inasmuch as -the spring 54continues its eiectiveness in tending to pull the bell-crank 8d- 9,8upwardly, the triangular wheel 121| does not rest in the dashed-line'position of Figure 7 but rather assumes the yfull-line .position oi thewheel |24, which is .similar .but exactly opposite to the ,dashed-lineposition of 'the triangular wheel shown in Figure A. The apex |26strikes a vertical wall 'IED similar to the wall |48 and slides downinto a recess |62 similar Lto the recess 15D, whereupon it -causes somerotation of the -triangular wheel IFM. 'In'this .position .the drivechain 1li! Ais locked'in engaged ,position around the sprocket 38 sothat it limparts rotation to the spreader unit shafts f5., 20,.and'32.

A forward pull of the rope ||`B will bring the apex l|313 of the'triangular wheel |213 `onto a camlike end portion I6# similar to Vthecammed end T52, whereupon further rotation off 4the wheel 124 `isobtained and a release of the pull-rope ||-8 permits 'the apex |26 tocome down within a large recess '|66 similar to the recess |155,whereupon the 'action of the spring 54 pulls the chain 40 from itsVengaging position shown in Figure ll, where it remains after pulling ofthe rope il I8.

The triangular wheel |2Ll is adapted to remain in the recesses |46 andTS2 for the reason that a line 'drawn between the pivot |138 oT thewheel "|24 vand the 'apex 'of the wheel lodged in either of theserecesses |56 or |62 is substantially 4perpendicular to the position ofthe .lever arrn 98, which `carries the wheel |24.

As previouslystated, the 'roller |04 is 4adapted to hold the lowerstrand vor -the chain di! up out of engagement with the 4sprocket 33.However, when the chain 40 .is .brought down into engagement with thesprocket 3'3, it is no longer desired that this roller |84 act to holdthe chain 4B in an upper position. Hence, when the lever arms 80 turndownwardly about their pivot 62, the

arm Il is also moved downwardly, and its lower end 1| I-G, which is thepoint of connection to the link IM is vmoved i-n Ya rearward direction,thus causing the holding arm |-6 to pivot downwardly about its pivot|68, -as Vbestshow'n in Figure '2.

The wagon portion ofthe 'spreader IB has `its sides 26 `iiared at'theirupper edges, as shown at |68 Vin Figure `3. A hood or protective`covering |111 is shown depending from the upper end of this .flaredVportion |68 and covers the operating locking mechanism just described.This prevents tampering with the locking mechanism and preventsaccidents which would be caused'by persons putting their hands in theway of ,moving parts and prevents foreign .objects from entering.

The pull rope 2| |8is, ofcourse, -iiexible contrary to al1 previouslyused actuating mechanisms for drive-chain releases and engagements. Themechanism used on ythese .prior devices, as .heretofore stated, was arigid link .capable `of being moved forwardly .or rearwardly and lockedin either of these positions, whereas now theropepull IIB is capable of`engaging and-disengaging the drive chain d0 merely upon successiveiorward pulling of the rope. The present locking device need not belimited to use on manure spreaders but may .be used ton any implementwhere it is desiredto engage or disengagea driving chain.

T-he intention is .to limit the vinvention only within the scope of theappended claims.

What Yis claimed is:

l. In a, manure-spreader drive, `a frame structure, Aa drive elementmounted on said frame structure, a drive member adapted to optionallyand operatively engage said drive element,:means for maintaining saiddrive member inl -remotefDO- sition from said drive element, and meanslfor shifting and locking said `drive member in engaging position withsaid drive element .and in disengaged position yby successive pulling ofa single rope, said means for shifting and locking comprising `avstationary kmember on said frame structure having irregular cut-'outportions inthe upper Yend thereof anda rotatable detent adapted to movewith 'sai-d shifting drive member and engage the cut-'out portions in.said stationary member.

2. In a manure-spreader'dr-ivaa Ydrive element, members to be driven, faflexible drive `member adapted to drivingly 'engage .said ,members to.be driven, means `for maintaining .said :flexible drive member inremote vposition from said .drive element, and means .for shifting `'andlocking :said flexible drive member in engaging position with said driveAelement and in disengaged y.posi-tion by successive pulling of .avsingle rope, said means for shifting 4and locking comprising astationary member having :irregular cut-out portions 'in fthe upper end.thereof and a .rotatable "triangular wheel .having rounded apices .andconcave `sides journaled on and adapted to move Withsaid shifting exible:drive member, and .said .triangular wheel .adapted to .lockably `engagevthe cut-out portions in 4said .stationary member. 4

3. Infa manure-spreader drive, a housingstructure, a `drive-elementjournaled on said housing s-tmcture,.ra;plurality .of members to bedriven, a flexible drive member adapted to -dri-vingly engage .saidmembers to be driven, means for `maintaining said flexible-'drive memberin remote "posit-ion -from said Adrive element, iand ,means 'forshifting and "locking said ilexible drive member in engaging positionwith said-drive element and in disengaged lposition by successivepulling .of a single rope, .said means 4(for shifting and lockingcomprisingas'tationary member attached fto said housingstructure andhaving a pair of oppositelyformed identical .cut-out portions in theupper edge thereof and a `rotatable triangular datent having rounded.apices .and .concave sides, :journaled onsaidshifting .iiexible drivemember and movable therewith ,adaptedy to ride over tl-1e `cutout .upper.edge of the .stationary member and be 7 optionally locked in either ofsaid cut-out portions.

4. In a manure-spreader drive, a drive element, a housing structure, aplurality of members to be driven, a flexible drive member adapted todrivingly engage said members to be driven, means for maintaining saidflexible drive member in remote position from said drive element, andmeans for shifting and locking said flexible drive member in engagingposition with said drive element and in disengaged position bysuccessive pulling of a single rope, said means for shifting and lockingcomprising a stationary member mounted on said housing structureandhaving a pair of oppositelyformed identical cut-out portions in theupper edge thereof and a rotatable triangular detent having roundedapices and concave sides mounted on said shifting ilexible drive member,said triangular detent movable with said shifting flexible drive memberand adapted to ride in the cut-out portions in theupper edge of thestationary member, said cutout portions having small and large recessesand cammed edges whereby, when an apex of the triangular detent islodged in a small recess, the detent is prohibited from rotating andupon pulling the single rope the triangular detent strikes the cammedportions and rotates so that an apex of the detent lodges in a largerecess and permits the detent to roll over and out of the cut-outportion.

5. In a driving mechanism comprising a frame structure, a drive shaftjournaled in said frame structure, a driving sprocket mounted on saiddrive'shaft, an arm pivotally mounted on said frame structure, asprocket journaled on said pivotally mounted arm, an idler sprocketassociated with said frame structure and positioned between the drivingsprocket and the sprocket on the arm, an endless chain draped around allthe said sprockets, means for lowering and raising said pivotallymounted arm for effecting a lowering and a raising of the one end ofsaid endless chain resulting in engagement and then disengagement ofsaid driving sprocket by said `endless chain, means for releasablylocking said arm in either lowered r raised position, said last-namedmeans comprising a stationary member integral with said frame structureand having a plurality of irregular cut-out portions, and a rotatabledetent member associated with said pivotally mounted arm and adapted toengage the cut-out portions in said stationary member.

6. In a driving mechanism comprising a frame structure, a drive shaftjournaled in said frame' structure, a driving sprocket mounted on saiddrive shaft, an arm pivotally mounted on said frame structure, asprocket journaled on said pivotally mounted arm, an idler sprocketassociated with said frame structure and positioned between the drivingsprocket and the sprocket on the arm, an endless chain draped around allthe said sprockets, means for lowering and raising said pivotallymounted arm for effecting a lowering and a raising of the one end ofsaid endless chain resulting in engagement and then disengagement ofsaid drivingsprocket by said endless chain, means for releasably lockingsaid arm in either lowered or raised position, said last-named meanscomprising a stationary member integral with said frame structure andhaving a plurality of irregular cut-out portions, a rotatable detentmember mounted for rotation on said pivotally mounted arm and adapted toengage the cut-out portions in said 'stationary member,` and resilientmeans positioned between said arm 8 and a, spaced point on said framestructure, said resilient means adapted to normally hold said pivotallymounted arm in non-driving position.

7. In a driving mechanism comprising a frame structure, a drive shaftjournaled in said frame structure, a driving sprocket mounted on saiddrive shaft, an arm pivotally mounted on said frame structure, asprocket; journaled on said pivotally mounted arm, an idler sprocketassociated with said frame structure and positioned between the drivingsprocket and the sprocket on the arm, an endless chain draped around allthe said sprockets, means for lowering and raising said pivotallymounted arm for effecting a lowering and a raising of the one end ofsaid endless chain resulting in engagement and then disengagement ofsaid driving sprocket by said endless chain, means for releasablylocking said arm in either lowered or raised position, said lastnamedmeans comprising a stationary member on said frame structure and havinga plurality of irregular cut-oui; portions, a rotatable detent membermounted for rotation on said pivotally mounted arm, and adapted toengage the cut-out portions in said stationary member, spring meanspositioned between said arm and a spaced apart point on said framestructure for normally holding said pivotally mounted arm and itscarried endless chain in sprocket disengaged position, and actuatingmeans for locking said chain in all positions comprising a single pullrope.

8. In a manure spreader drive comprising a frame structure, a drivesprocket on said frame structure, an endless chain engaging sprockets tobe rotated, a bell-crank pivoted on said frame structure, a sprocket onone arm of said bellcrank and receiving the other end of said chain, aspring attached to the other arm of said bellcrank and to the framestructure whereby said spring normally holds said chain out ofengagement with the drive sprocket, means for causing rotation of thebell-crank arm against the action of the spring to effect engagement ofthe chain with said drive sprocket, locking means for posi- -tivelylocking said bell-crank in either of two positions whereby the chainwill be either in drive sprocket engaging or disengaging position, saidmeans for either locking comprising a plate stationary with said framestructure having twin cut-out portions in the upper edge thereof, a,triangular shaped wheel journaled on said bellcrank and adapted toengage the cut-out portions in said plate, and actuating means for saidlocking means comprising a rope which upon successive forward pullingwill lodge and dislodge said triangular wheel in either of said twincut-out portions in the stationary plate.

WILLIAM F. SCHMIED.

REFERENCES CITED The following references are o record in the le of thispatent:

UNITED STATES PATENTS Number Name Date 1,738,168 Bohmker Dec. 3, 19292,024,213 Gettys Dec. 17, 1935 871,845 Wilson Nov. 26, 1907 871,867Galloway Nov. 26, 1907 858,813 Loos July 2, 1907 2,292,952 MacDonaldAug, 11, 1942 439,803 Laird Nov. 4, 1890 1,486,930 y Smith Mar, 18, 19241,721,691 vDennis July 23,v 1929 888,747 'Rude et al May 26, 1908

